Calculating machine



May 16, 1939., R. 1.; MULLER 2,153,142

' CALCULATING MACHINE Original Filed Feb. 5, 1936 4 Sheets-Sheet 1 N N i mm INVENTO'R Row? L. Nb/Ier ATTORNEYS y 1939- R. L. MULLER 2,158,142

r cgbcum'rme momma Original Filed Feb. 5, 1936 4 Sheets-Sheet 3 INVENTOR Rob fT mi /eh M r z ATTORNEYS May 16, 1939- R L. MULLER 2,158,142

CALCULATING MACHINE 4 Sheets-Sheet 4 Original Filed Feb. 5, 1936 INVENTO R l t\ v Rob IT L.NU//er' ATTORNEYS Patented May 16, 1939 UNITED STATES PATIENT ol-"rica cawmnrmc MACHINE Original application February 5, 1936, Serial No.

62,393. -Divided and this application December 5, 1936, Serial No. 114,418

1 Claim. (Cl. 235-137) This invention relates to tens-transfer mechanism. The application is a division of my application, Serial No. 62,393, flied February 5, 1936.

The general object of the invention is to pro- 5 vide an improved tens-transfer mechanism.

Other objects and advantages of the invention will appear from the following specification and drawings.

An embodiment of the invention is shown in the 10 accompanying drawings in which- Figure l is a left side elevation of a machine with which the invention has been illustrated.

Fig, 2 is a partial left side elevation showing some of the mechanism for controlling the registers or totalizers with which the tens-transfer mechanism is associated.

Fig.- 3 is an enlarged detail of the tens-transfer mechanism with the parts shown in normal add position.

Fig. 4 is a partial left side elevation and section showing the mechanism for changing the condition of the tens-transfer mechanism.

Fig. 5 is a detail right side elevation and section of the restoring mechanism.

25 Fig. 6 is a detail view of portions of the control for the tens-transfer mechanism.

The invention is shown applied to a Burroughs machine of the type illustrated in my parent application, the most of the features of which are 30 well known and the description of which will be confined in this application to a brief explanation of the parts more particularly associated with the tens-transfer mechanism.

General features of calculating machine The machine has the usual amount keys I (Fig. 1) upon which items may be indexed and which control actuator racks II that are meshed with gears I4. The gears I4 thus form a part of the actuating mechanism and for the purpose of, the present description, will be included within the term actuators.

A plurality of registering mechanisms or totalizers I5, I6 and I! mesh with the actuators I4, but

since the tens-transfer mechanism associated with each register is the same, the description of the present application will be confined to the register II.

The machine may be conditioned for addition or subtraction, or it may be non-added, either by hand or automatically. The manual control for the register II is by a lever I22 shown in Fig. 1. Automatic control is through an automatic sensa ing device including feelers" such as the feeler 46 in Fig. 1, which move into engagement with stops on a drum 30 that is rotatedby the paper carriage. This sensing control is described in detail in my present application.

The machine may be given cycles of operation by hand, or by a motor, during which the mechanism of the machine is moved through a forward and a return stroke.

In order to-understand the tens-transfer mechanism, it is necessary to understand the control of the register I5 in more detail.

' Register control Referring to Fig. 2, the register or totalizer I5 is carried by a rocking frame 400 fixed to a shaft MI. In the machine with which the invention is shown, the registering mechanism is connected directly with the actuators by rocking the frame 4IIO to engage and disengage the registering mechanism with the actuators I4, said rocking action being effected by a link or pitman I26 connected to a crank 400 fixed to shaft 40I. The register I5 is shown in its disengaged position in Fig. 2 where it is held by a spring-urged detent 402 that cooperates with-a cam point 403 on the 25 register frame. This detent serves to releasably hold the crank 400* in either of its two positions.

The pitman I26 is moved back and forth by a cam 405 fix'ed to a shaft I I5 that is rocked during each cycle of machine operation, said shaft cor- 30 responding to the shaft ordinarily known as the 800 shaft on the Burroughs machine. ,The cam 405 has two arms 406 and 401, and each arm is provided with two campoints, the arm 401 having the points 408 and 469 and the arm 406 ,havingthepoints4IIIand4II.

Fixed to a shaft 4I5 is a lever 4I6 urged counterclockwise by a spring 4I1' (Fig. 2) against a limit stud 4". This lever has a stud M9 on its lower end adapted to engage in a slot 420 in the pitman I26. When the pitman is in add position, which is the position illustrated in Fig. 2, the stud H9 is in the slot 420.

Also fixed to the shaft 4 I 5 is an irregular shaped lever 42I having a roller stud 422 on its lower 45 end and a pass-by pawl 423 on its upper end, the latter carrying a roller stud 424. The two roller studs 422 and 424 are-positioned for operation by r the cam points of the cam arm 40! of cam 405.

The manually controlled lever I22 is connected to a four-armed lever I20 which is normally urged to the add position of Fig. 2 by a spring I24 and in this position the pitman I26 is held in its lower or Fig. 2 position with the stud 420 in the slot M9.

. with the parts in the position of Fig. 2, assume Tens-transfer mechanism m z g g giz ifii gi gg 3 g ggg g'gg i The tens-transfer mechanism is capable of opterclockwise from 'i line position of F18 2 eration during both addition and subtraction,

5 to the dot dash position The cam point me a that is, it will effect both cai-Iys" and "borrows".

' Referring to Fig. 3, each register pinion I5 is 5 the end of arm 401 passes away from stud 422 provided with a toothed, tens-transfer member without affecting it. Near the end of the forward or segment 5 pivoted on the shaft 5'. These stroke, the cam point see passes the pawl 42% l. a

without affecting the position of the lever 42L At i iiifi gfi g ig zg g g i m z ifi g gge i;

10 the very beginning of the return Stroke the cam described The tens-transfer se ments iire nor 10 point 409 engages the roller stud 424 and rocks g mally latched in the position of Fig. 3 by latches the lever clockwise ms rocks sham 452 pivoted on a shaft 453.. The latches have together with lever 4I6 clockwise and moves link was we engaging m notches 55 m then.

I26 to the left in Fig. 2, thereby rocking the regave segments said latches being urged e1oek ister I5into engagement with the actuators. The wise as vlewed m Fig 3 by Springs The is register remains in engagement until the end of shaft 4M to which the tens-transfer segments the t' stmke when the cam mint engages 450 are pivoted and the shaft 45: to which the the roller Stud on lever and rocks said latches are pivoted are carried by stationary lever counterclockwise, thus moving the lever 4N flame plates of the machine in the same direction and pushing the link I26 to A transfer pawl 80 is provided for each 20 the right to rock the register out of engagement ion, said pawlsbeing pivoted loosely on a shaft h the actuatttrs' In the normal posttton of 46! and urged counterclockwise as viewed in Fig. cam 405, the cam end 408 contacts the roller 422 3 by their respective springs L Each pawl has and hows the lever m positmn of as a forwardly extending arm 463 limiting against to maintain the register m disengaged posttton' a bar 464 on the register frame. Each pawl is 25 although it is also releasably maintained m this also provided with a nose 465. arranged to be enposmon by the detent P gaged by a wide pinion on its respective register Subtraction is performed by changing the timpinion said noses being Shaped so that the pawls ing of the engagement between the register and Wm operated by their pmiens when the letter 30 the actuators. F this purpose lever is are rotated in either addition or subtraction di- 30 provided, wh1ch is pivoted on the shaft 43! and rectum. The shaft 5| carrying the pews o utged cltckwtse by spring mm engagement is carried by the register frame so that these -w1th Stud The upper end of this pawls move with the register as the latter is ver carries a stud 434 adapted to engage in a slot moved mm and out of engagement with the 35 435 in the pitman I26 when said pitman is raised tutors 35 to subtract position by the four armed lever 120.-

one of the pimens passes from its The lever 430 carries two pass-by pawls, a lower to or through its no" position or vice verse, the pawl having a roller f and an upper wide tooth engages the nose 465 on the respecpa'wuas having a roller sum tive pawl 460 and rocks said pawl clockwise as Assume that the ttnk ttt has been viewed in Fig. 3 to an "initial transfer position 40 ward to subtract position so that its slot 420 is disengaged from the stud Hi9 and its slot 436 is where it is latched by a later; 5 zi r k engaged over the stud 434. Then, assume that 8: i gg a g s a on 6 ex enslon the machine is given a cycle of operation. As Each pawl a has an upwerd extension carry the cam 405 moves counterclockwise the point in a stud "u adapted to engage an arm n! 45 H0 of the cam arm 406 engages roller stud 431 g e t f th and rocks the lever 430 counterclockwise. This tormed yoke 12 m the On or i pulls the link I26 to the left to engage the reg- Egg 3213 i gfii i g ggg i g g g i .;ister with the actuators at the beginning of the one of the pews a is Set in its initial transfer forward stroke of the machine The'pa'rts position while the register is engaged with the 50 main in this condition during the forward stroke. Near the end of the forward stroke the cam point actuators then as the register z out f of am without affecting the position of lever 430. But, me w a d I m t at the beginning of the return stroke the point the engage the 6 4II engages the roller stud 439 and rocks the higher orderand rock the corresponding latch 55 lever no clockwise to push the pitman "e to the 402 so as to release the transfer segment to enable right to disengage the register from the acg i zz g g m s figg r i fi fig m tuators. It will thus be seen that, in subtraction an e add or subtract direction means of a the register is engaged with the racks at the bee I s device comprising for each Segment a 60 ginning the ward and the mums pair of arms 41: and m (Fig. 3) loosely pivoted are rotated in a direction opposite to that in which they are rotated for addition. This method a shaft and urged one another by a. spring 418. The free ends of these arms are of erforming subtraction is well known and 85 theliheory of need be m on opposite sides of a stud 411 on the respective When the four armed lever I20 is moved to tran f r sesment'lw The position of he rmsis non-add position, that is, to a central position controlled by a bail 418 extending between proas related to its add and subtract positions, the jections on all the arms 413 and 414 and carried pitman I26 is swung to a position such that it by arms 414 fixed to shaft 415. when this bail is disengaged from both the stud H9 and the stud is in the position of Fig. 3, it engages the arm 70 434. When the machine is given a cycle of op- 413 and holds it in the position shown to put a oration the cam 40!! actuates the levers 42I and tension on spring 416 tending to urge the arm 414 430 as heretofore described but, since these levers clockwise. This urges the tens-transfer segare not connected to the pitman I26, they have ments 450 in add direction, that is, in a direction no effect upon the position of the register. to cause a "carry" as distinguished from a "bor- 75 row". when the bail 418 is swung to the right hand, or dot-dash position of Fig. 3, it engages an extension on the arm 414 and swings it counterclockwise so as to put a tension on spring 418 urging the arm 418 411; thus tending to move the tens-transfer segments 450 downward in a subtract or "borrow direction. The bail 418 is positioned in response to the addition or subtraction condition of the machine by a mechanism best shown in Fig. 4.

Pivoted on the shaft 415 is another scissors device comprising arms 480 and I whose free ends are joined by the spring 482. These arms limit against a stationary stud 488 and also cooperate with a stud 484 on an arm 485 fixed to the shaft 415. The arm 485 may occupy either a central or neutral position shown in dot-dash lines (Fig. 4), an add position shown in full lines, or a "subtract position shown in dot-dash lines at the right of latched in either its "add or subtract positions by a bell crank latch 488 urged clockwise by a spring 481. This latch has appropriate shoulders for the purpose adapted to engage over a lug on arm 485 as shown in Fig. 4. The left hand end of latch 488 carries a stud 485 adapted to be engaged by a shoulder on a. pawl 488 pivoted on the end of an arm 489 fixed to the shaft that carries the register frame, said pawl 488 being urged counter-clockwise as viewed in Fig. 4 by a spring. When the register I5 is rocked into engagement with the actuators, the shaft 40! is rocked counter-clockwise (Fig. 4), which moves the arm 488 in the same direction, whereupon the pawl 488 rocks the latch 486 counter-clockwise to release the arm 485. The arm 485 is then free to move under the influence of the scissors device 480-48I in the direction in which it is urged. Thus, every time the register is rocked into engagement with the actuators, no matter whether timed for addition or subtraction, the latch 488 is moved, the arm 485 attached to shaft 415 is released, and this arm, together with shaft 415 and the bail 418 (Fig. 3), is moved to a neutral position.

The arm 485 is also controlled by two links 490 said links comprising respectively an add and a subtract link, and having their right hand ends (Fig. 4) pivoted to arm 485. The free ends of these links are urged downwardly by springs 482 against a limit stud 488 whose purpose will be presently described. The add link 480 is provided with a shoulder 494 and the subtract link with a shoulder 495, the two shoulders being oppositely positioned and adapted for engagement with a stud 498 on the end of a lever 481 pivoted at 498. The lower end of this lever is connected by a link 500 to another lever 50I pivoted at 502 and urged to its central position by a toggle spring 503. The lever 50I has a roller stud 504 on its upper end and a pass-by pawl 505 on its lower end carrying a roller 506. These two roller studs 504 and 508 are positioned soas to be engaged by a cam I on the shaft I48 that is rocked during each cycle of machine operation. When the machine is given a cycle, the cam I45 is first rocked counter-clockwise and then returned clockwise. During the forward stroke, the cam I45 passes pawl 505 and, near the end of said stroke, said cam engages the roller stud 504 to rock the lever I clockwise.

Assume that, at the beginning of the cycle, the arm 485 is in the "add" position of Fig. 4 and the links 480 and 48I are in the position there shown in which the add" link 488 is in its lower or counterclockwise against stiid Fig. 4. The arm'may be.

, clockwise, which active position while the subtract-link is inactive. These two links are so positioned by reason of the shape of their lower edges which engage stud 483. Also, assume that addition is being performed. As stated, near the end of the for ward stroke, the cam I45 engages roller 504 and rocks lever 50I clockwise, which, through link 500, rocks lever 49'! in the same direction. The notch in link 490 is of such length that, when lever 48! is rocked clockwise under the condistud 488 does not move link 490. Accordingly, the parts remain in the position shown in Fig. 3 during the forward stroke of the machine. During this portion of the stroke the register is not in engagement with the actuators but is in engagement with the tens-transfer segments.

At the beginning of the return stroke, the register is rocked into engagement with the actua-.

As the register is rocked toward the actuators, the arm 488 (Fig. 4) is rocked countercauses the shoulder on pawl 488 to engage stud 488, thereby rocking latch 488 counterclockwise. This frees arm 485 for movement to its central or neutral position under the urge of its spring 482. As the arm 488 completes its counterclockwise movement, a rearward projection on the pawl 488 engages a stud 488 on the side frame of the machine, thereby causing the pawl 488 to be rocked clockwise, which releases latch 486 for movement back to latching position, the arm 485 having in the meantime moved to its central position. The latch 486 contacts the lug on the lower end of arm 485 but does not latch said arm because there is no shoulder on latch 488 for engaging arm 845 when the latter is in its central position. The effect of this movement of arm 485 is to move the links 490 and 48I to a central position (Fig. 6) so that stud 493 allows both to be lowered to active position where they are responsive to further movements of stud 495. Also, the tenstransfer segments scissors device 413-414 (Fig. 3) is moved to a neutral position which moves the tens-transfer segments to their normal or restored position where they are latched by latches 452. To put it another way, when the register is rocked into engagement with the actuators, the mechanism controlling the transfer segments is moved to a'neutral position ready to be conditioned to either carry or borrow.

During the return stroke of the machine the I register is in engagement with the actuators and the tens-transfer segments are not active to elfect tens-transfers. The transfer pawls 460 are, however, being set in "initial transfer positions. Near the end of the return stroke, the cam I 45 (Fig. 4) rocks the lever 50I counterclockwise and moves the lever 49'! counterclockwise. This pulls the add link 490 to the left to pull the arm 485 to add position, which rocks shaft 475 clockwise in Figs. 3 and 4, thus putting a tension on the tens-transfer segments 450 tending to cause a carry. The latch 488'helng free snaps to position under the urge of its spring 481 to hold arm 485 in add position. The timing of the parts'is such that the tension is put on the tens-transfer segment before the register is rocked out of engagement with the actuators and into engagement with the transfer segments. The movement of the register into engagement with the transfer segments trips the latches 452 for all orders where the pawls 488 have been set and causes the necessary carry to take place.

, the beginning of the When the subtraction is performed the register is rocked into engagement with the actuators at forward stroke of the machine. The pawl 488 is thus moved immediately and it pulls the latch 485 to released position and permits arm 485 to move to its .central or neutral position at once. This positions both links 495 and 49I in active relation to stud 456 and restores the scissors device for the tens-transfer segments to normal which causes said segments to move to their normal or restored postion where they are latched. The register is in engagement with the actuators and not with the tens-transfer segments and the latter are not. used during the forward stroke. Near the end of the forward stroke the cam I45 (Fig. 4) engages roller 504 and rocks lever 50I clockwise. This rocks the lever 491 clockwise and stud 495 then engages the shoulder 495 and moves link 49I to the right to move the arm 455 to the subtract position shown in dotdash lines in Fig. 4. This rocks shaft 415 counterclockwise and movesthe scissors device 413-414 (Fig. 3) to place a tension on the tens-transfer segments before the register engages said segments as it moves out of engagement with the actuators at the beginning of the return stroke. This movement of the register trips the latches 452 for all orders where a pawl 450 has been set and causes the necessary borrows to take place.

Near the end of the return stroke, the cam I45 engages roller 506 and rocks lever 50I counterclockwise. This moves lever 491 in the same direction. If the link 490 were in active position, its shoulder 494 would be engaged by stud'495 and there would be a force exerted tending to pull link 490 and arm 485 back toward neutral position. But, when the links 490 and 49I were moved by movement of arm 485 to subtract position, the lower cam edge of link 490 riding on stud 493 moves said link to inactive position and no movement of the link 490 will occur at the end of said return stroke.

A restoring mechanism for the tens-transfer is provided, which is best shown in Fig. 5. Fixed to the shaft I45 that is oscillated during each machine cycle is anarm 5I0 having a cam nose 5 adapted to engage a roller stud 5I2 on a pass-by pawl 5I3 carried by a bell crank5I4. This bell crank is connected by a link 5I5 to a second bell crank 5I5 having a stud and slot connection with a three-armed lever 5I1 pivoted on the shaft 5I8. The left hand arm 520 of the three-armed lever 5" is positioned under a stud 52I upon an arm 522 fixed to the shaft 523 on which the latches 455 are loosely pivoted (Fig. 3). The arrangement is such that, at the very beginning of the forward stroke of the machine, the cam vnose5II operating on rollers 5I2, moves the parts just described so as to rock the shaft 523 clockwise as viewed in Fig. 3. Fixed to the shaft 523 are two arms 524 carrying a bail 525 positioned under extension 525 on the latches 455. When the shaft 523 is rocked clockwise, the latches 455 are moved to released position which permits the pawls 455 -ing means for said to be moved to normal by their springs 452. The other two arms of of which the bell crank M8 is connected are for restoring the latches of the tens-transfer mechanims of the registers I5 and I1. i

The transfer segments are restored to normal every time the arm 485 (Fig. 4) is movedto its central position, which occurs every time the latch 485 is released, and the latch 485 is released when the register is moved into engagement with I the actuators.

From this it will be seen that, whenever the register is moved out of engagement with the tens-transfer segments, said segments are restored to normal. This does not always occur at the same point in the machine cycle. In adding operations it occurs near the beginning of the return stroke and, in subtraction, it occurs at the beginning of the forward stroke. The time at which the register moves into engagement with the actuators not only determines when the transfer segments are returned tonormal, but it also determines whether the tenstransfer mechanism shall be conditioned to carry or to borrow, because the question of which of the links 490, 49I shall be moved depends upon when they are both placed in active position, and the time of this event depends upon the movement of the register into engagement with the actuators. This automatic control of the tens-transfer mechanism during a machine cycle in accordance with whether the connection between the registering mechanism and the actuators is an add or subtract connection is believed to be new.

It is to be understood that the construction shown is for purposes of illustration only and. that variations may be made in it without departing from the spirit and scope of the invention.

I claim:

In a machine of the class described having actuators and a registering mechanism adapted to be connected together to perform addition. or subtraction, a tens-transfer mechanism, actuattens-transfer mechanism adapted to occupy a neutral", a carry, or a borrow condition, means operating at the beginning of each machine cycle to restore portions of said tens-transfer mechanism operated during prior tens-transfers, means operating automatically as said registering mechanism and actuators d are connected together to place said actuating means in ane'tural" condition, and means operating automatically as said registering mechanism and actuators are connected to perform addition, to condition said actuating means to cause it to be operated during a machine cycle to place the tens-transfer mechanism in carry condition, and as said registering mechanism and actuators are connected for subtraction, to place said actuating means in condition to cause it to be operated during a machine cycle to place said tens-transfer mechanism in borrow condition.

ROBERT L. MULLER.

the three-armed lever 5I1 

